JPS63272455A - Grinder for disc brake rotor - Google Patents

Abstract

PURPOSE:To prevent the position deflection of a work by connecting a main clamp arm and an auxiliary clamp arm which hold a holder for nipping a disc brake rotor from both surfaces, onto a worktable by a plurality of clamp shafts. CONSTITUTION:When a hydraulic cylinder 80 is extension/contraction-operated, a connecting arm 57 shifts in the transverse direction, and also a main clamp arm 30 connected with the connecting arm 57 through a clamp shaft 38 and a cylindrical shafts 51 shifts in the transverse direction. While, an auxiliary clamp arm 32 is slidingly moved in the transverse direction by the extension/ contraction-movement of a hydraulic cylinder 60. Since the main clamp arm 30 is supported by the clamp shafts 34, 36, and 38, and the auxiliary clamp arm 32 is supported by the clamp shafts 34 and 36, the position deflection of the holders 42 and 45 is prevented. Therefore, a work W nipped by the holders 42 and 45 can be always held in the regular position and attitude onto a worktable, and correct grinding is permitted.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a grinding machine for grinding a disc brake rotor.

(Prior art and its problems) A grinding machine in which a main clamp arm and an auxiliary clamp arm are supported by one clamp shaft and a disc brake rotor is held between the two arms has been known. In the conventional technology, positional deviations tend to occur in both arms around the clamp shaft, and it may not be possible to clamp the workpiece, the disc brake rotor, at a predetermined position.

(Objective of the Invention) An object of the present invention is to provide a grinding machine for a disc brake rotor that can clamp the disc brake rotor in a proper position.

(Structure of the Invention) (1) Technical Means The present invention provides a grinding machine for a disc brake rotor that has a work table that holds the disc brake rotor at a predetermined grinding position and rotates the disc brake rotor. This grinding machine for disc brake rotors is characterized in that a main clamp arm and an auxiliary clamp arm are connected to a work table by a plurality of clamp shafts.

(2) Function Since both arms are supported by a plurality of clamp shafts, both arms do not shift in position, and the disc brake rotor is clamped in the correct position.

(Example) In FIGS. 1 and 2 showing the case where the present invention is applied to a double-headed grinding machine for disc brake rotors, 10 is a loading part of a disc brake rotor which is a workpiece;
12 is a work table, 14 is a grindstone moving unit, D is an electric control panel having a signal processing device C, and F is a hydraulic unit.

The loading section 10 includes a supply chute 16 that guides the work to the work table 12, which will be described in detail later, an escape 18 that regulates the guidance of the work, a hydraulic cylinder 20 for driving the escape 18, and a measurement mechanism 2 that determines the type of work.
It consists of 2nd class. 17 is the IJ for the workpiece to be machined again.
This is the discharge chute that takes out the I.

As shown in FIG. 3, the workpiece W has a boss portion 24, a disk portion 26, etc., and the dimensions of each portion, such as the TSK, differ depending on the vehicle model.

Note that the dimensions M and N of each part of the workpiece W vary depending on the type of workpiece W;

N is determined by a combination of the above dimensions and T.

Therefore, the measurement mechanism 22 measures the dimensions of the workpiece W and T.
, K are measured, the type of work W is determined by the signal processing device C, and the feed amount of the work table 12 and the grindstone moving unit 14 is controlled (Japanese Patent Application No. 60-14006
No. 7). A hole 25a is formed in the boss portion 24 of the workpiece W, and 278 of the disk portion 26 is a grinding surface.

The main parts of the work table 12 that holds the workpiece W will be explained with reference to FIG. 4, which is an enlarged view of section IV in FIG. 2.

The work table 12 has a fourth main clamp arm 30 and an auxiliary clamp arm 32 that clamp the work W from both sides.
They are arranged at intervals in a direction perpendicular to the plane of the paper in the figure.

First, the auxiliary clamp arm 32 on the near side is supported by two clamp shafts 34 and 36, and the main clamp arm 32 is supported by two clamp shafts 34 and 36.
0 is supported by three clamp shafts 34, 36, 38.

In FIG. 5, a shaft 40 is pivotally supported at the lower end of the main clamp arm 30 by a bearing 41, and a holder 42 is fixed to the right end of the shaft 40 to be fitted into the hole 25a of the workpiece W. There is. A driving hydraulic motor 43 is connected to the left end of the shaft 40.

A shaft 44 is attached to a bearing 4 at the lower end of the auxiliary clamp arm 32 that faces the main clamp arm 30 while holding the workpiece W therebetween.
1, and the left end of the shaft 44 has a holder/1.
A holder /i5 for holding the workpiece W is fixed between the two.

A clamp shaft 34 is attached to the upper end of the auxiliary clamp arm 32.
A boss portion 46.47 passing through the clamp shaft 34.36 is integrally formed, and the clamp shaft 34.36 is fixed with a nut 48. The clamp shaft 34 is connected to the main body 50 of the work table 12.
The cylindrical shaft 51 is fitted to the outer periphery of the clamp shaft 34 to allow the clamp shaft 34 to slide in the lateral direction. The right end portion of the cylinder shaft 51 is fixed to the boss portion 52 of the main clamp arm 30 with a nut 53.

A bushing 55 is provided between the cylinder shaft 51 and the boss portion 54 of the main body 50.
, a sleeve 56 is interposed.

The left end of the cylinder shaft 51 is fixed to a connecting arm 57,
A rod 61 of a hydraulic cylinder 60 is fixed to the right end of the clamp shaft 34 through a hole 58 of the connecting arm 57. Therefore, by expanding and contracting the hydraulic cylinder 60, the clamp shaft 34 is moved to the main body 50. Main clamp arm 30
The auxiliary clamp arm 32 is slid in the lateral direction to adjust the position of the auxiliary clamp arm 32.

The clamp shaft 36 is a boss portion 62 of the main clamp arm 30,
The connecting arm 57 slidably passes through the hole 63 of the main body 50.
It passes through the hole 64. A magnet 65 is provided at the left end of the clamp shaft 36, and the position of the magnet 65 is adjusted to the connecting arm 57.
This structure restricts the movement limit of the auxiliary clamp arm 32 by detecting it with a proximity switch 66 fixed to the auxiliary clamp arm 32.

The right end of the clamp shaft 38 is fixed to the boss portion 71 of the main clamp arm 30 with a nut 70, and the right end of the clamp shaft 38
The left end of 8 fits into the hole 72 of the connecting arm 57 and is fixed with a nut 73. In addition, the clamp shaft 38 and the main body 5
A bushing 75 and a sleeve 7 are provided between the boss portion 741 and the sleeve 7.
6 is interposed, and the clamp shaft 38 is slidable with respect to the boss portion 74.

A hydraulic cylinder 8o is fixed to the upper surface of the main body 50, and a rod 81 of the hydraulic cylinder 80 is fixed to the connecting arm 57 with a sleeve 82. Note that 83 is a proximity switch.

In the above configuration, the connecting arm 57 moves laterally with respect to the main body 5o by extending and contracting the hydraulic cylinder 8o, and the connecting arm 57 is moved by the clamp shaft 38 and the cylindrical shaft 51.
The main clamp arm 30 connected to the main clamp arm 30 slides in the lateral direction by the expansion and contraction movement of the hydraulic cylinder 8o.

On the other hand, the auxiliary clamp arm 32 is connected to a hydraulic cylinder 60, and the main body 50,
It is slidable laterally with respect to the main clamp arm 3o. The expansion and contraction operations of the hydraulic cylinder 80 and the hydraulic cylinder 60 are controlled by the signal processing device C.

The main clamp arm 30 also has three clamp shafts 34.
Since it is supported by 36.38, the main clamp arm 3
0 is supported by the clamp shafts 34, 36, and 38 in a normal posture, and there is no possibility that the holder 42 will be misaligned. The auxiliary clamp arm 32 has two clamp shafts 34. ．． Similarly, the auxiliary clamp arm 32 also maintains its normal posture, and there is no fear that the holder/1.5 will be misaligned as in the conventional case.

Therefore, the work W held between the holders 42 and 45 is always in the normal position and posture on the work table 12 (
(Fig. 2), and the main clamp arm 30. There is no fear that the holding position and posture of the workpiece W will shift as in the conventional case where the auxiliary clamp arm 32 is supported, and the angle of the grinding surface 27a (Fig. 3) of the workpiece W may be distorted or the boss portion 24 may be ground. This prevents this from happening.

(Effects of the Invention) As described above, the disc brake rotor grinding machine according to the present invention has a main clamp arm 30 and an auxiliary clamp arm 32 that clamp the disc brake coater from both sides, and a plurality of clamp shafts 34, 36. .38 is connected to the work table 12, so the main clamp arm 30 and the auxiliary clamp arm 32 are attached to the clamp shaft 34.
．． 36, 38 can be supported at two or three points, it is possible to prevent the positional shift of the holders 42, 45 that clamp the workpiece W from both sides, and the workpiece W can be accurately ground.

[Brief explanation of the drawing]

Claims (2)

[Claims] (1) In a grinding machine for disc brake rotors that has a work table that holds the disc brake rotor in a predetermined grinding position and rotates it, a plurality of main clamp arms and auxiliary clamp arms that clamp the disc brake rotor from both sides are used. A grinding machine for disc brake rotors, characterized in that it is connected to a work table with a clamp shaft. (2) The main clamp arm is provided on three clamp shafts, and the auxiliary clamp arms are provided on two of the main clamp arm clamp shafts. Grinder.